BMW 7 Series vs Mercedes-Benz S-Class: key replacement compared
Shopping the BMW 7 Series against the Mercedes-Benz S-Class? They are a common flagship luxury sedans cross-shop in the Statesboro area, and the key replacement story is different enough to matter. If you are weighing which is simpler or quicker to get a replacement key for, here is the head-to-head: key technology by model year, how a lost-key job actually runs on each, and the field quirks we see most. Call (912) 209-6131 for same-day mobile service on either one.
BMW 7 Series vs Mercedes-Benz S-Class at a glance
| BMW 7 Series | Mercedes-Benz S-Class | |
|---|---|---|
| Model years covered | 2002–2025 | 2007–2025 |
| Earliest key type | Transponder / Comfort Access | Smart Key / Infrared |
| Newest key type | Proximity / Display Key | Proximity / Keyless-Go |
| Lost-all-keys handling | Often on-site; some years need dealer / PIN coordination | Often on-site; some years need dealer / PIN coordination |
| Spare from a working key | On-site, same visit | On-site, same visit |
Key types by year, side by side
Both vehicles changed key technology over their runs, so the right blank, chip, and programmer depend entirely on your model year. Here is what each one uses:
BMW 7 Series
HU92 blade, CAS / CAS2 slot key.
HU100R blade, CAS4 / CAS4+ system.
HU100R emergency blade, BDC system. Dealer-level tooling typical.
Mercedes-Benz S-Class
HU64 blade, FBS3 infrared key.
HU64 emergency blade, FBS3 / FBS4 system.
HU64 emergency blade, FBS4 system. Dealer-level tooling required.
Which is simpler or quicker to key?
Both the BMW 7 Series and the Mercedes-Benz S-Class have year ranges where a lost-all-keys job can require a manufacturer PIN or dealer coordination, so keeping at least one working key on either is the simplest insurance against a stranded day. With a working key, either one has a spare programmed on-site; we confirm the exact path by VIN before dispatching.
The quirk that trips people up on each
- Slot-key wear on the E65. Early 7 Series slot keys fail in the dash reader as the contacts wear; the reader, not the key, is at fault.
- Infrared early keys. 2007-2013 S-Class keys use infrared, not RF; a generic RF remote won't communicate with the car at all.
How a key job runs on either one
The path works the same way on both. The simplest job on either vehicle is a planned spare made while you still have a working key, because that key acts as the authentication seed and the work is short. A lost-all-keys situation takes more steps on either one, since the programmer has to read the immobilizer PIN before it can enroll a new key. We confirm the exact part by VIN before we dispatch, so the right blank, chip, and programmer are on the truck when we arrive.
Get a replacement key in Statesboro, GA
We are a mobile automotive locksmith and we come to you anywhere in Statesboro, Bulloch County, and southeast Georgia, no tow and no dealership wait, for both the BMW 7 Series and the Mercedes-Benz S-Class. Call (912) 209-6131.
Compare the full guides
- BMW 7 Series key replacement guide, all years and key types
- Mercedes-Benz S-Class key replacement guide, all years and key types
- All BMW car keys
- All Mercedes-Benz car keys
Frequently asked: BMW 7 Series vs Mercedes-Benz S-Class keys
Is the BMW 7 Series or the Mercedes-Benz S-Class simpler to make a key for?
They are comparable. A spare made from a working key is the simplest path on either vehicle; a lost-all-keys situation takes more steps because we read the immobilizer PIN first. We confirm the exact path by VIN before dispatching.
Can you make a key for both on-site in Statesboro?
Yes. Both the BMW 7 Series and the Mercedes-Benz S-Class are handled by our mobile unit at your location for the large majority of year ranges. Any exception that needs dealer coordination is flagged on the phone when we confirm your VIN, so the work is set up correctly before we arrive.
Do I need the original key to get a replacement?
No. With a working key we make a spare in a single visit because the original acts as the authentication seed. With no key at all, we read the immobilizer PIN and build a key from your VIN. Both vehicles support both paths.